Wood-mortising machine



6N0 Modem s. F; T'IBBETTS. WOOD M ORTISING MACHINE.

Patented Dec. 15,1896.

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UNITED STATES PATENT OFFICE...

SAMUEL F. TIBBETTS, OF BIDDEFORD, MAINE.

WOOD-MORTISING MACHINE.

SPECIFICATION forming part of Letters Patent No. 573,312, dated December15, 1896. Application filed December 19, 1894. Serial No. 532,340. (Nomodel.)

T0 at whom it may concern.-

Be it known that I, SAMUEL F. TIBBETTS, a citizen of the United States,residing at Biddeford, in the county of York and State of Maine, haveinvented certain new and useful Improvements in Wood-Mortising Machines,of which the following, taken in connection with the accompanyingdrawings, is a specification.

My invention relates to certain improvements in mortising-tool holdersfor woodworklug-machines and in the means for imparting a rotary motionto said tools; and the invention is particularly applicable for machinessuch as shown and described in Patent No. 455,538, issued to me the 7thday of July, 1891.

Referring to the accompanying drawings, Figure 1 represents a front Viewof a pair of tool-holders and their immediate connections embodying myinvention. Fig. 2 is a vertical section taken on line a: 00 of Fig. 1.Fig. 3 is a half side view and half-section of a tool-holder, rotarycutters, and driving-gear, drawn to a larger scale. Fig. 4 is an endview of same, and Fig. 5 is a vertical section taken on line y y of Fig.

A A represent the front and rear rails,-

which extend from end to end of the machine. Upon each of these railsare mounted blocks or bearings 13 B, which are free to be moved to therequired positionon the rails A and there secured by set-screws O.

D is a tool-carrier of U shape and fitted at each end with a pintle orstud E, that works in a hole formed in the blocks or bearings B, so thatthe tool-carrier is free to oscillate in the center of the machinebetween the rails A.

A rod F is screwed into the bottom of each of the tool-carriers D, andwhen the tool-carriers are used in pairs the lower ends of said rods Fare connected by a short bar G, formed with a series of holes, so thatthe distance apart can be easily adjusted by the insertion of pins g. Onone of the rods Fis fitted a small block H, free to be slid up and downand when in the desired position secured by a set-screw h. This block His attached to an arm I, secured at its outer end to a block J, adjustably secured to a horizontal bar K, to which a reciprocating motionis imparted by any suitable means, thus imparting an oscillating motionto the tool-carrier D, as described in the aforesaid Patent No. 455,538.By means of the adjustable block H the throw of the cutters canberegulated to a hairs breadth, so that a mortise of any desired lengthcan'be cut.

' L L are spindles for carrying the cutting tools T. These spindles passthrough the tool-carrier. D, and the upper end of each spindle is heldbetween two steadying-pieces d d, projecting from the top of thetool-carrier D, to keep said spindle steady, and in order to hold thesepieces d in contact with the spindle and also to prevent said piecesfrom spreading I inclose them in a tapering cured to the top of thetool-carrierD by screws on. This metal case M is of a width somewhatless than the diameter of the cutterhead T, so that it will pass freelyinto the mortise being cut. Thus the metal pieces 61 are only of thesame width as the diameter of the spindle and are held thereto by themetal case M, that prevents said pieces (1- from spreading, which wouldotherwise be the case if said cases M were not employed. Thus the twosteadying-pieces'd d are held in close contact with the spindle, causingit to run steady, while dirt or dust isprevented from entering betweensaidsteadying-pieces and the spindle.

Upon each of the spindles L is mounted a bevel-wheel N, which is securedin the desired place by a set-screw it, according to the depth ofmortise to be out. By this arrangea common height, each of thebevel-wheels N forming the support for its spindle, and in gear witheach of said bevel-wheels N is one loosely upon a stud Q,secured in thecarrier D. The outer faces of both of the bevel-wheels P are in gearwith a bevel-wheel R, secured upon a shaft S, that runs the whole lengthof the machine and to which shaft a rotarymotion is imparted by anysuitable means.

I11 order to secure the cutting-tool in the spindle, I drill a hole inthe upper end of each of said tool-spindles L, and said end is alsoformed with a cross groove or recess, the hole being to receive the endof the cutter T and the groove or recess to hold the head so that itcannot turn in its spindle. By this conmetal case M, which at its lowerend is se-' ment the spindles can be readily adjusted to face of adouble beve1-wheel P, mounted struction I am enabled to employ spindlesof hard steel rods and a cutter of a steel of different temper, so thatshould a cutter become broken or damaged a new one can be readilyinserted into the spindle at a very small cost.

By the above-described construction two pieces of material can beoperated upon at the same time, each tool-carrier having two cutters towhich a rotary motion is imparted from the same gear on thedriving-shaft,wl1ile an oscillating motion is imparted to thetoolcarrier and to the cutters. The centers of the pintles E and thegears P P B, being on the same plane,allow the gears to rotate while thetool-holder is being oscillated.

That I claim is 1. In a Woodworking-machine atool-holder free tooscillate upon pintles secured in adjustable blocks mounted upon therails of the machine said tool-holder carrying spindles each adjustablysupported in a bevel-wheel, in gear with one face of a double-facedbevelwheel, the other face of which is in gear with a bevel-wheelmounted upon a shaft to which a rotary motion is imparted substantiallyas set forth.

2. In a woodworking-machine an oscillatin g tool-holder carrying tworotating spindles and having two tapering steadying-pieces for each ofsaid spindles the Width of the steadying-pieces being about the diameterof the spindles whereby each spindle is held on its two sides in aconical holder, a conical metallic case for holding each pair of saidtapering steadying-pieces close to the spindle and also preventing saidsteadying-pieces from spreading substantially as set forth.

3. In a woodworking-machine a central driving-shaft S, a bevel-wheel Rmounted thereon in combination with an oscillating tool-holder D,recessed in its central portion, two double-faced bevel-wheels P mountedupon studs and working in said recess bevelwheels N, cutter-spindlescarried by said wheels N, and two steadying-pieces d, cl for each cutterspindle, and a metallic case around said stead yin g-pieces and spindlesubstantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 2d day of August, A. D.1894.

SAMUEL F. TIBBETTS.

Witnesses:

.RADCLIFFE H. FORD,

J. E. ETCHELLS.

